Quoin



July 15, 1924. 1.501,?53

J. J. CURTIS 'QUOIN Filed May a, 1923 2 Sheets-Sheet. 1

W/T/VESSES r v /7 07165 .f. dull Z5 July 15, 1924.

' I J. J. CURTIS QUOIN Fild May 8,1923 2 Sheets-finest 2 INVEN'I'OR 3207265 .f lifls WITNESSES A TTORNE Y8 Patented July 15, 1924.

UNITED STATES FICE.

JAMES J. CURTIS, OF NEW YORK, N. Y.

l QUOIN;

Application filed May 8,

T 0 all whom it may concern:

Be it known that I, JAMES J CUnTIs, a citizen of the United States, and a resident of the city of New York, borough of Man hattan. in the county and State of New York, have invented a new and Improved Quoin, of which the following is a full, clear, and exact description.

This invention relates to quoins and particularly to an improved construction which will not become accidentally loosened even when appreciably jarred.

The object of the invention is to provide a strong construction which will not become loosened accidentally and which is formed so as to remain normally in a given position under the action of friction but which may be locked in any desired position at any time.

Another object of the invention is to provide a quoin in which the two parts thereof cannot become separated.

A still further object is to provide a quoin in which locks are provided at opposite ends designed to readily lock the quoins in any adjusted position at two points.

In the accompanying drawing Figure 1 is a side view of a pair of quoins disclosing an embodiment of the invention.

Figure 2 is a top plan view of the upper quoin shown in Figure 1. V

Figure 3 is a sectional view through Figure 1 approximately on line 3-3, the same being on an enlarged scale.

Figure 4 is a side view of the locking member shown in Figure 3.

Figure 5 is a fragmentary sectional view through Figure 3, approxlmately on line 55.

Figure 6 is a fragmentary perspective view of a slightly modified form of locking means to that shown in Figure 3.

Figure 7 is a transverse sectional view through Figure 6, approximately on line Figure 8 is a fragmentary top plan view of the lower quoin shown in Figure 1.

Figure 9 is a sectional view through Figure 8, approximately on line 9-9.

Figure 10 is a transverse sectional view through Figure 8, on line 10-10.

Referring to the accompanying drawings by numeral, 1 and 2 indicate the two quoins which co-act to complete the pair of quoins as they are to be used. Heretofore, quoins ha ing subs anti lly the same genera ap- 1923. Serial No. 637,546.-

pearance have been provided but were merely loosely fitted together and would readily they loosely fit together and there is so much loose motion, the quoins donot' always rema1n in position when under sure.

In the present invention, the quoins 1 and" In addition, lockingmeans are arranged at each end of each quoin to positively prevent any accidental sliding of either quoin. As shown in Figvures 1, 2, 3, 4 and 5, the quoin 2 is provided with the usual teeth'3'for receiving a key used in adjusting the quoins and with a tongue 4 having its surface arranged at an angle to the bottom 5 of the quoin; 'The tongue 4 is not only provided with cor'rugations 6 on each side but is formed asa dove'-- tail as shown in Figure 3 so that the 0 site quo'in may readily co-act therewith.

The tongue 4 of the quoin 1 is also corru-jj gated on the SIClBS and is formed as adovetail as illustrated particularly in Figure-3 whereby 1t may readily co-act with the underlying gripping tion 8 of the locking member 9 portion orprojection 7" and with the underlying or rip'pingf p01- From Figure 2, it will be obser'v'edthat" the large end of the quoin' 2 is provided with a cutout port-ion 10 in which the 'loclting member 9 is placed, said locking member being chamfered at 11 so as to present a pivotal point 12 whereby when the set screw or looking screw 13 is tightened, the locking member 9 may be forced over tightly against the tongue 4. Preferably, the projection 7 and also the underlying or gripping portion 8 is corrugated as shown in Figures 4 and 5 whereby they will more firmly grip the tongue 4t whenever in operation. In addi tion, the parts are made to rather snugly fit the tongue and, consequently, to resist accidental shifting movement. A pin 14: is mounted in the end of tongue 4: and acts to prevent the separation of the respective quoins 1 and 2. A locking structure similar to that illustrated in Figures 2 and 3 may be used in respect to the quoin 1 but preferably the structure shown in Figures 8, 9 and 10 is used. This construction consists of a solid locking block 15 slidingly mounted in the bore 16 of the quoin 1, said block being provided with groove 17 having nnrlerlying gripping; portions 18 and 19 which may be smooth or corrugated as preferred and which act to grip the side walls of the tongue 4:. In order to cause a gripping action to take place, arotatable actuating bar 20 is provided, said bar having fiat surfaces 21 and 22 together with a central.,roundportion upwardly and cons equently, cause the mem belrs and 19 topinch-the tongue 4. Itjwill bei-noted tha ti-either-of the locking membe; may be actuated at any time so as to lock the; quoins in the position shown in. Fig

ure l or when they-are moved to a different pos1t1'on.-

In Figures 6 and.7,'a modified'torm of the inyention-is shown: in which. a single set screw'26;-,-isused and acts to lock theyparts togetherwhenproperly adjusted. Two set screws of this kind may be used in respect to theftwo quoinsor oneset screw and one of. the-locking structures shown in Figures 3 andet.

What I claim is 1. A =quoinw of the character described, comprisingqa body provided with a bead andarranged at an angle to the bottom of the body, said body' being provided with a pairi oi upstanding members at one end forming groove therebetween, said body at said; npstanding members being provided The endsiof the actuating bar 20 with an opening a clamping block arranged in said opening, said clamping block being formed with a pivotal point, and a set screw carried by one of said upstanding members for swinging said block on its pivotal point for causing the same to operate as a loclrfor locking a CO-ElCtlDg quoin in place.

A quoin, comprising a body, locking means carried by thebody for locking ac0- acting quoin. thereto, said locking meanscomprising a swinging locking block, and a set screw for swinging said block intoloclc:

ing position.

3..A quoin of the character described,v comprising a body and locking means 0211'? ried by the body for engaging and lockinga co-acting quoin, said locking.,;means includ-r ing a locking block formed with an underhanging portionadapted to engage thebead of the co-acting quoin, and. a rotatable mem ber for shifting theblock toa position for causingsaid underhangingportion to move to a gripplng POSllZlOl).

4. A quoln, comprising a body with a bead and locking means for. engaging and. locking thebead of a co-a-cting quoin, said locking means comprising a mov able block movable toward and from the side walls of said bead, and a threaded member traveling transversely of the bead. and en:

provided gaging the block for moving the same against said bead in order to lock the quoins together.

5. A quoin, comprising a body provided with a bead and locking means for engag ing and locking the head to a co-acting quoln, said locking means comprising a locking block movable toward and from one of the side walls of said last mentionedbead,

and means for moving. said block toward said bead.

JAMES cUBTIs. 

